/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-5644d1e-m
[2020-08-19 06:59:06,604 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-19 06:59:06,607 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-19 06:59:06,631 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-19 06:59:06,631 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-19 06:59:06,635 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-19 06:59:06,637 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-19 06:59:06,638 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-19 06:59:06,640 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-19 06:59:06,641 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-19 06:59:06,642 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-19 06:59:06,643 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-19 06:59:06,643 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-19 06:59:06,644 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-19 06:59:06,645 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-19 06:59:06,646 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-19 06:59:06,647 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-19 06:59:06,648 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-19 06:59:06,649 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-19 06:59:06,651 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-19 06:59:06,653 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-19 06:59:06,654 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-19 06:59:06,655 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-19 06:59:06,656 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-19 06:59:06,658 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-19 06:59:06,658 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-19 06:59:06,659 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-19 06:59:06,659 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-19 06:59:06,660 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-19 06:59:06,661 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-19 06:59:06,661 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-19 06:59:06,662 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-19 06:59:06,662 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-19 06:59:06,663 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-19 06:59:06,664 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-19 06:59:06,664 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-19 06:59:06,665 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-19 06:59:06,665 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-19 06:59:06,666 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-19 06:59:06,667 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-19 06:59:06,667 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-19 06:59:06,668 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-19 06:59:06,691 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-19 06:59:06,692 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-19 06:59:06,693 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-19 06:59:06,693 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-19 06:59:06,694 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-19 06:59:06,694 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-19 06:59:06,694 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-19 06:59:06,694 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-19 06:59:06,694 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-19 06:59:06,695 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-19 06:59:06,695 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-19 06:59:06,695 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-19 06:59:06,695 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-19 06:59:06,695 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-19 06:59:06,696 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-19 06:59:06,696 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-19 06:59:06,696 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-19 06:59:06,696 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-19 06:59:06,696 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-19 06:59:06,697 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-19 06:59:06,697 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-19 06:59:06,697 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-19 06:59:06,697 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-19 06:59:06,697 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-19 06:59:06,698 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-19 06:59:06,698 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-19 06:59:06,698 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-19 06:59:06,698 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-19 06:59:06,698 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-19 06:59:06,699 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;
[2020-08-19 06:59:07,025 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-19 06:59:07,037 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-19 06:59:07,041 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-19 06:59:07,042 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-19 06:59:07,043 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-19 06:59:07,043 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-19 06:59:07,115 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e60c8f15a/f488f5e21d224df38d4630617526db71/FLAG187feba6c
[2020-08-19 06:59:07,777 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-19 06:59:07,778 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-19 06:59:07,799 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e60c8f15a/f488f5e21d224df38d4630617526db71/FLAG187feba6c
[2020-08-19 06:59:07,911 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e60c8f15a/f488f5e21d224df38d4630617526db71
[2020-08-19 06:59:07,922 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-19 06:59:07,924 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-19 06:59:07,925 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-19 06:59:07,925 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-19 06:59:07,929 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-19 06:59:07,930 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:59:07" (1/1) ...
[2020-08-19 06:59:07,933 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52df6c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:07, skipping insertion in model container
[2020-08-19 06:59:07,934 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:59:07" (1/1) ...
[2020-08-19 06:59:07,942 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-19 06:59:08,100 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-19 06:59:09,273 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 06:59:09,299 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-19 06:59:09,797 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 06:59:09,827 INFO  L208         MainTranslator]: Completed translation
[2020-08-19 06:59:09,829 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09 WrapperNode
[2020-08-19 06:59:09,829 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-19 06:59:09,830 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-19 06:59:09,830 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-19 06:59:09,830 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-19 06:59:09,845 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:09,847 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:09,890 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:09,890 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:09,955 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:09,996 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:10,006 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
[2020-08-19 06:59:10,027 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-19 06:59:10,028 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-19 06:59:10,028 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-19 06:59:10,028 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-19 06:59:10,029 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-19 06:59:10,119 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-19 06:59:10,120 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-19 06:59:10,120 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-19 06:59:10,121 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-19 06:59:10,121 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-19 06:59:10,121 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-19 06:59:10,122 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-19 06:59:10,123 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-19 06:59:10,123 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-19 06:59:10,124 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-19 06:59:10,124 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-19 06:59:10,124 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-19 06:59:10,125 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-19 06:59:10,125 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-19 06:59:10,125 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-19 06:59:10,126 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-19 06:59:10,126 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-19 06:59:10,127 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-19 06:59:10,127 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-19 06:59:10,127 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-19 06:59:10,127 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-19 06:59:10,127 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-19 06:59:12,711 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-19 06:59:12,712 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-19 06:59:12,722 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:59:12 BoogieIcfgContainer
[2020-08-19 06:59:12,722 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-19 06:59:12,723 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-19 06:59:12,724 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-19 06:59:12,727 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-19 06:59:12,727 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:59:07" (1/3) ...
[2020-08-19 06:59:12,728 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40393999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:59:12, skipping insertion in model container
[2020-08-19 06:59:12,728 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:59:09" (2/3) ...
[2020-08-19 06:59:12,729 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40393999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:59:12, skipping insertion in model container
[2020-08-19 06:59:12,729 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:59:12" (3/3) ...
[2020-08-19 06:59:12,730 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-19 06:59:12,741 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-19 06:59:12,750 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-19 06:59:12,767 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-19 06:59:12,795 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-19 06:59:12,795 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-19 06:59:12,795 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-19 06:59:12,795 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-19 06:59:12,796 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-19 06:59:12,796 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-19 06:59:12,796 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-19 06:59:12,796 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-19 06:59:12,831 INFO  L276                IsEmpty]: Start isEmpty. Operand 796 states.
[2020-08-19 06:59:12,854 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-19 06:59:12,854 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:12,856 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:12,856 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:12,862 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:12,863 INFO  L82        PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times
[2020-08-19 06:59:12,872 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:12,873 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741246361]
[2020-08-19 06:59:12,873 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:13,679 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:14,553 WARN  L193               SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:14,558 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:14,570 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:14,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:14,830 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741246361]
[2020-08-19 06:59:14,832 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:14,833 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 06:59:14,835 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981918561]
[2020-08-19 06:59:14,843 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 06:59:14,843 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:14,857 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 06:59:14,858 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:14,860 INFO  L87              Difference]: Start difference. First operand 796 states. Second operand 4 states.
[2020-08-19 06:59:15,361 WARN  L193               SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-19 06:59:20,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 06:59:20,290 INFO  L93              Difference]: Finished difference Result 1515 states and 2659 transitions.
[2020-08-19 06:59:20,291 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 06:59:20,293 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-19 06:59:20,296 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 06:59:20,323 INFO  L225             Difference]: With dead ends: 1515
[2020-08-19 06:59:20,324 INFO  L226             Difference]: Without dead ends: 1299
[2020-08-19 06:59:20,330 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-19 06:59:20,354 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1299 states.
[2020-08-19 06:59:20,465 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297.
[2020-08-19 06:59:20,466 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1297 states.
[2020-08-19 06:59:20,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions.
[2020-08-19 06:59:20,476 INFO  L78                 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318
[2020-08-19 06:59:20,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 06:59:20,478 INFO  L479      AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions.
[2020-08-19 06:59:20,479 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 06:59:20,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions.
[2020-08-19 06:59:20,485 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-19 06:59:20,486 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:20,486 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:20,487 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-19 06:59:20,487 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:20,487 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:20,488 INFO  L82        PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times
[2020-08-19 06:59:20,488 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:20,488 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102850973]
[2020-08-19 06:59:20,489 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:20,704 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:21,298 WARN  L193               SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:21,300 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:21,306 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:21,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:21,589 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102850973]
[2020-08-19 06:59:21,590 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:21,590 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 06:59:21,591 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318797465]
[2020-08-19 06:59:21,594 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 06:59:21,594 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:21,594 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 06:59:21,595 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:21,595 INFO  L87              Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states.
[2020-08-19 06:59:22,203 WARN  L193               SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-19 06:59:26,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 06:59:26,506 INFO  L93              Difference]: Finished difference Result 2671 states and 4201 transitions.
[2020-08-19 06:59:26,506 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 06:59:26,506 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-19 06:59:26,508 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 06:59:26,522 INFO  L225             Difference]: With dead ends: 2671
[2020-08-19 06:59:26,523 INFO  L226             Difference]: Without dead ends: 2289
[2020-08-19 06:59:26,530 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-19 06:59:26,535 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2289 states.
[2020-08-19 06:59:26,614 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287.
[2020-08-19 06:59:26,615 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2287 states.
[2020-08-19 06:59:26,627 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions.
[2020-08-19 06:59:26,628 INFO  L78                 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318
[2020-08-19 06:59:26,630 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 06:59:26,630 INFO  L479      AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions.
[2020-08-19 06:59:26,630 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 06:59:26,630 INFO  L276                IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions.
[2020-08-19 06:59:26,639 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-19 06:59:26,643 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:26,644 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:26,644 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-19 06:59:26,645 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:26,645 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:26,646 INFO  L82        PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times
[2020-08-19 06:59:26,647 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:26,647 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956939772]
[2020-08-19 06:59:26,647 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:26,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:27,395 WARN  L193               SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:27,397 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:27,404 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:27,519 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:27,519 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956939772]
[2020-08-19 06:59:27,520 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:27,520 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 06:59:27,520 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042062058]
[2020-08-19 06:59:27,521 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 06:59:27,521 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:27,522 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 06:59:27,522 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:27,522 INFO  L87              Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states.
[2020-08-19 06:59:27,974 WARN  L193               SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-19 06:59:32,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 06:59:32,673 INFO  L93              Difference]: Finished difference Result 4943 states and 7762 transitions.
[2020-08-19 06:59:32,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 06:59:32,674 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-19 06:59:32,676 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 06:59:32,697 INFO  L225             Difference]: With dead ends: 4943
[2020-08-19 06:59:32,698 INFO  L226             Difference]: Without dead ends: 4229
[2020-08-19 06:59:32,701 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-19 06:59:32,706 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4229 states.
[2020-08-19 06:59:32,826 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227.
[2020-08-19 06:59:32,826 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4227 states.
[2020-08-19 06:59:32,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions.
[2020-08-19 06:59:32,841 INFO  L78                 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318
[2020-08-19 06:59:32,842 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 06:59:32,842 INFO  L479      AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions.
[2020-08-19 06:59:32,842 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 06:59:32,842 INFO  L276                IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions.
[2020-08-19 06:59:32,852 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-19 06:59:32,852 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:32,853 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:32,853 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-19 06:59:32,853 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:32,854 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:32,854 INFO  L82        PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times
[2020-08-19 06:59:32,854 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:32,855 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141579248]
[2020-08-19 06:59:32,855 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:33,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:33,675 WARN  L193               SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:33,677 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:33,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:33,890 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:33,891 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141579248]
[2020-08-19 06:59:33,891 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:33,892 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 06:59:33,892 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945940851]
[2020-08-19 06:59:33,892 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 06:59:33,893 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:33,893 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 06:59:33,893 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:33,893 INFO  L87              Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states.
[2020-08-19 06:59:34,339 WARN  L193               SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-19 06:59:38,310 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 06:59:38,311 INFO  L93              Difference]: Finished difference Result 9359 states and 14670 transitions.
[2020-08-19 06:59:38,311 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 06:59:38,311 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-19 06:59:38,312 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 06:59:38,349 INFO  L225             Difference]: With dead ends: 9359
[2020-08-19 06:59:38,349 INFO  L226             Difference]: Without dead ends: 8029
[2020-08-19 06:59:38,355 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-19 06:59:38,365 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8029 states.
[2020-08-19 06:59:38,557 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027.
[2020-08-19 06:59:38,557 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8027 states.
[2020-08-19 06:59:38,585 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions.
[2020-08-19 06:59:38,586 INFO  L78                 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318
[2020-08-19 06:59:38,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 06:59:38,587 INFO  L479      AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions.
[2020-08-19 06:59:38,587 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 06:59:38,588 INFO  L276                IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions.
[2020-08-19 06:59:38,607 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-19 06:59:38,607 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:38,608 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:38,608 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-19 06:59:38,609 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:38,609 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:38,609 INFO  L82        PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times
[2020-08-19 06:59:38,610 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:38,610 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284851058]
[2020-08-19 06:59:38,610 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:38,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:39,526 WARN  L193               SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:39,527 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:39,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:39,663 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:39,664 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284851058]
[2020-08-19 06:59:39,664 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:39,664 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-19 06:59:39,665 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076782576]
[2020-08-19 06:59:39,665 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-19 06:59:39,665 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:39,666 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-19 06:59:39,666 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-19 06:59:39,666 INFO  L87              Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states.
[2020-08-19 06:59:47,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 06:59:47,147 INFO  L93              Difference]: Finished difference Result 23754 states and 36777 transitions.
[2020-08-19 06:59:47,148 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-19 06:59:47,148 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 318
[2020-08-19 06:59:47,149 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 06:59:47,235 INFO  L225             Difference]: With dead ends: 23754
[2020-08-19 06:59:47,235 INFO  L226             Difference]: Without dead ends: 15742
[2020-08-19 06:59:47,259 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-19 06:59:47,282 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15742 states.
[2020-08-19 06:59:47,810 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740.
[2020-08-19 06:59:47,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15740 states.
[2020-08-19 06:59:47,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions.
[2020-08-19 06:59:47,843 INFO  L78                 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318
[2020-08-19 06:59:47,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 06:59:47,843 INFO  L479      AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions.
[2020-08-19 06:59:47,843 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-19 06:59:47,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions.
[2020-08-19 06:59:47,874 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-19 06:59:47,874 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:47,876 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:47,880 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-19 06:59:47,880 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:47,880 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:47,880 INFO  L82        PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times
[2020-08-19 06:59:47,881 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:47,881 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928725309]
[2020-08-19 06:59:47,881 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:48,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:48,500 WARN  L193               SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:48,501 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:48,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:48,634 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:48,635 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928725309]
[2020-08-19 06:59:48,635 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:48,636 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 06:59:48,636 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733485813]
[2020-08-19 06:59:48,636 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 06:59:48,637 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:48,637 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 06:59:48,637 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:48,637 INFO  L87              Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states.
[2020-08-19 06:59:57,766 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 06:59:57,767 INFO  L93              Difference]: Finished difference Result 46481 states and 71518 transitions.
[2020-08-19 06:59:57,767 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-19 06:59:57,768 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 320
[2020-08-19 06:59:57,768 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 06:59:57,832 INFO  L225             Difference]: With dead ends: 46481
[2020-08-19 06:59:57,833 INFO  L226             Difference]: Without dead ends: 30870
[2020-08-19 06:59:57,874 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:57,911 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30870 states.
[2020-08-19 06:59:58,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868.
[2020-08-19 06:59:58,799 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30868 states.
[2020-08-19 06:59:58,854 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions.
[2020-08-19 06:59:58,855 INFO  L78                 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320
[2020-08-19 06:59:58,855 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 06:59:58,855 INFO  L479      AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions.
[2020-08-19 06:59:58,855 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 06:59:58,856 INFO  L276                IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions.
[2020-08-19 06:59:58,908 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-19 06:59:58,908 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 06:59:58,908 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 06:59:58,909 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-19 06:59:58,909 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 06:59:58,909 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 06:59:58,910 INFO  L82        PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times
[2020-08-19 06:59:58,910 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 06:59:58,910 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451371924]
[2020-08-19 06:59:58,910 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 06:59:58,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:59,399 WARN  L193               SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-19 06:59:59,400 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 06:59:59,405 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 06:59:59,601 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 06:59:59,603 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451371924]
[2020-08-19 06:59:59,603 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 06:59:59,603 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 06:59:59,604 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127992158]
[2020-08-19 06:59:59,604 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 06:59:59,604 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 06:59:59,605 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 06:59:59,605 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 06:59:59,605 INFO  L87              Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states.